Couloumb's Law 3 charges on a line

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The discussion centers on a problem involving three point charges and the calculation of net electric forces using Coulomb's Law. The user has calculated the forces between the charges but is unsure if their work is sufficient, having derived the force on the middle charge as -187.8 N. They express frustration over spending two hours on the problem and seek assistance. The calculations provided include the forces between q1 and q2, as well as q3 and q2, with specific values for charge and distance. The user is looking for confirmation or guidance on their approach to solving the problem.
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I did this problem just the way I took notes on it in class and keep coming up with the wrong answer. Please help I've spent nearly 2 hours on this one simple problem. Thanks.
Problem: Three point charges lie along a straight line as shown in the figure below, where q1 = 6.36 µC, q2 = 1.56 µC, and q3 = -1.84 µC. The separation distances are d1 = 3.00 cm and d2 = 2.00 cm. Calculate the magnitude and direction of the net electric force on each of the charges.

 
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You have to show your work so far.
 
Ok sorry, first time using the site. I did F of q1 on q2 is ((8.99x10^9) x .00000636 C x .00000156 C)/.0009 m=99.10576 N and F of q3 on q2 is ((8.99x10^9) x -.00000184 C x .00000156 C)/.0016 m=-286.72 N. Then for the Force on the middle charge I just added them together to get -187.8 N.
 
Is this enough work so far?
 

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